JP7 was formulate just for the SR71 and it was the only aircraft that used JP7.
When operating at high cruising speeds, the turbine inlet temperatures reached over 2000 degrees Fahrenheit, which required the development of a new type of fuel, known as JP7. It had a much higher ignition temperature than JP4. It required the use of a new type of chemical ignition system based on a fluid known as tri-ethyl borane.
http://home.att.net/~jbaugher1/f12.htmlNo other air force jet used a chemical ignition system
The rubble fire was not unusually hot - it was about 1200C. The problem is that the hot spots in the rubble pile were so large - we know it was not fuel burning 19 days after 9/11 and no one can even suggest a military weapon that would create such large and persistent fires. Napalm, thermite, white phosphorous create extremely high temperatures but they are short lived chemical reactions - they wouldn't be burning for days.
A better place for an answer is to perhaps look at underground fires like landfill or mine fires - perhaps what made the 9/11 fires so hard to put out was not their temperatures but the fact that they were inaccessible
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